Althon precast concrete Sewers for Adoption (SFA) headwalls fully comply with the Design and Construction Guidance for foul and surface water sewers offered for adoption under the Code for adoption agreements for water and sewerage companies operating wholly or mainly in England, Sewerage Sector Guidance (SSG) Part C.

Compliance includes wall thickness, depth and thickness of toe options, back wall width to accept correctly sized outfall safety grille & wing wall profiles to suit bank slope.

Our headwalls are designed to BS EN 1992-1-1 & manufactured to BS EN 15258:2008 precast concrete products – Retaining wall elements.  They are also covered by Factory Production Control certificate number: 0086-CPR-650448 which means they are UKCA marked.

Openings for pipes, elliptical pipes & box culverts can be cast into the back wall at the invert level required.

Althon headwalls are manufactured using a trademarked eco1™ concrete mix design. The standard eco1™ concrete mix, which is a cement & GGBS blend, significantly reduces C0²e emissions by 50% when compared to a standard CEM1 concrete mix. In addition to the eco1™ environmental credentials; it achieves Design Chemical Class 4 and Design Sulphate Class 4 making Althon headwalls suitable for use in aggressive environments. Althon headwalls can be manufactured using other proprietary mix designs for even greater carbon savings.

Headwall accessories can be factory fitted.  Threaded sockets are cast in during manufacture to allow trash screens, security grilles, flap valves, penstocks and Kee Klamp® handrail to be bolted on. This saves time during installation and offers health & safety benefits. Should you need to remove any of the accessories they can be reattached by simply bolting back on, no need to re-drill and resin fix.  This also ensures the Declaration of Performance isn't voided by possibly hitting & exposing reinforcement during drilling.

C0²e stands for Carbon Dioxide Equivalent. C0²e is a unit of measurement used to express the amount of greenhouse gasses emitted because of human activity.

If you require any assistance or more information please contact us by phone on 01603 488700 or by email